25 lecture apr 24

25 lecture apr 24 - Human ecology History of human...

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1 Human ecology History of human population growth Why our population will continue to grow for some time The ecological consequences of a huge human population Final exam: May 6 at 1215 here “Ecologists put phosphorus in one lake and left the other one alone. They later measured the color of the water in the two lakes, which had been the same originally. What hypothesis was the experiment designed to test?” Why is the following answer wrong: (Lake water should turn from blue to green after aquatic plants have increased in response to added phosphorus) A. This answer really constitutes test evidence. B. No statement with “should” in it can be a hypothesis. C. Hypotheses are statements about what might happen if you did an experiment, not about what the outcome should be. D. Hypotheses are statements about what might be responsible for a natural phenomenon, not about the expected results of an experiment. Changes caused by global warming? 1938 Grinnell Glacier 2005 Shrinking glaciers worldwide
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2 If Global Temperature Increases and Ice Caps Melt . . Global Climate Change: Will warmer oceans
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25 lecture apr 24 - Human ecology History of human...

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